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                [JLOI2011]不重复数字                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><div style="layout-grid-mode: char; text-indent: 21pt"><span style="font-size: medium">给出N个数，要求把其中重复的去掉，只保留第一次出现的数。</span></div>
<div style="layout-grid-mode: char; text-indent: 21pt"><span style="font-size: medium">例如，给出的数为1 2 18 3 3 19 2 3 6 5 4，其中2和3有重复，去除后的结果为1 2 18 3 19 6 5 4。</span></div>
<div style="layout-grid-mode: char; text-indent: 21pt"><span style="font-size: medium">&nbsp;</span></div></p><hr/><h3>输入格式</h3><p><div style="layout-grid-mode: char; text-indent: 21pt"><span style="font-size: medium">输入第一行为正整数T，表示有T组数据。</span></div>
<div style="layout-grid-mode: char; text-indent: 21pt"><span style="font-size: medium">接下来每组数据包括两行，第一行为正整数N，表示有N个数。第二行为要去重的N个正整数。</span></div>
<div style="layout-grid-mode: char; text-indent: 21pt"><span style="font-size: medium">&nbsp;</span></div></p><hr/><h3>输出格式</h3><p><div style="layout-grid-mode: char">&nbsp;</div>
<div style="layout-grid-mode: char; text-indent: 21pt"><span style="font-size: medium">对于每组数据，输出一行，为去重后剩下的数字，数字之间用一个空格隔开。</span></div></p><hr/><h3>样例输入</h3><pre>2
11
1 2 18 3 3 19 2 3 6 5 4
6
1 2 3 4 5 6
</pre><hr/><h3>样例输出</h3><pre>1 2 18 3 19 6 5 4
1 2 3 4 5 6
</pre><hr/><h3>提示</h3><p><p class="MsoNormal" style="margin: 0cm 0cm 0pt 21pt; mso-para-margin-left: 2.0gd"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">对于</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">30%</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">的数据，</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">1 &lt;= N &lt;= 100</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">，给出的数不大于</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">100</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">，均为非负整数；</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt"><o:p></o:p></span></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt 21pt; mso-para-margin-left: 2.0gd"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">对于</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">50%</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">的数据，</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">1 &lt;= N &lt;= 10000</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">，给出的数不大于</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">10000</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">，均为非负整数；</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt"><o:p></o:p></span></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt 21pt; mso-para-margin-left: 2.0gd"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">对于</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">100%</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">的数据，</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">1 &lt;= N &lt;= 50000</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">，给出的数在</span><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">32</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">位有符号整数范围内。</span></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><b style="mso-bidi-font-weight: normal"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-size: 10.5pt">提示</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="font-family: &quot;Courier New&quot;; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">:<o:p></o:p></span></b></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">由于数据量很大，使用</span><span lang="EN-US"><font face="Times New Roman">C++</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的同学请使用</span><span lang="EN-US"><font face="Times New Roman">scanf</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</span><span lang="EN-US"><font face="Times New Roman">printf</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来进行输入输出操作，以免浪费不必要的时间。</span></font></p>
<p></p></p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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